I let it sit for about a month but I still started it up every couple days, The last time I started it but turned it off right away instead of letting it run. The next day it would no longer start. It has power, spark, fuel. Any suggestions?

 

alternator may be the cause because when you car runs the alternator recharges the bnattery. recharge your battery and if it does turn off right away instead of run its your alternator. i had the same problem a few months ago

 

alternator sounds pretty classic in this case, I buy a lot of impound cars and they sit for 30-90 days, every single one of them has dead batteries, sometimes if the battery is old too, after sitting for that long it will refuse to take a charge. If you don't have a charger, go buy a battery at pick-n-pull for 30 bucks and see.

 

sounds like a battery problem. have it check it at autozone to see if it can still take any charge before purchasing a new one